Battery barely lasts 10 hours in standby ???

Got this phone a couple days ago and I have to say I'm more than disappointed with its battery life. I've tried all the common tips (disable Bluetooth, GPS, etc.) and the the phone still lasts less than a day.

I didn't even use the phone yesterday at all and still, the battery was empty around 6 PM.

Is my phone broken or does Samsung seriously sell such a piece of garbage for $200?